The comparison of the 70 year old oil to 10W-40 taken from the freezer is not a good comparison . The 70 year old oil is probably like 30 WT oil while the "New" oil is 10W-40 multi viscosity . Of course it will flow faster .
It is a very good comparison for simply that reason. The difference is remarkable, and I have heard for 50 years, that "oil is oil and most of the claims are hype", especially when we were discussing the "gaining wide acceptance" of the 10w-40 as the "standard" back in the day, and so many folks would not run the "multi viscosity" oils because they figured it was killing engines, and most only ran straight 30 and quite a few ran "High Performance 40". No wonder folks were lucky (and thrilled) to see the odometer turn over at 99,999.
You are mis-interpreting what I am saying . It is comparing Apples to Oranges . Yes the modern Multi Vis oil is superior to single grade oil but it is still comparing apples to Oranges . Most of those engine failures can be attributed to years of use with Non detergent oil and then a change to Detergent motor oil which broke up all the crap and clogged galleys .
I misinterpreted nothing. Your post only mentioned flow characteristics. How am I to know all the other stuff in your head from that post? "Most" engine failures were from running oils that failed to provide proper oil film bearing during start up and first few hundred revolutions, over time. Rod and cam bearings are not actually the bearing, the oil is the bearing, and the things between them and the bores and journals are designed to give that oil "purchase", too thick an oil and the flow is insufficient to let that "fluid oil bearing" be "replaced" as necessary, and the result is breakdown of that "oil bearing" from heat, pressure and time. Correct oil viscosity and other important properties allow for the proper and best "oil bearing" to exist across all operating regimes, but most importantly, during the most stressful and demanding aspect The issue of high detergent oils "over cleaning" the engine and "crud that held it together" being the cause of many engine's demise is urban myth. The old "Pennzoil sludge" stories that everyone had a buddy who's engine died a horrible death when the "paraffin wax buildup" let go and trashed the motor", while doing 6 grand neutral drops, and reverse to drive "J hooks" had nothing at all to do with roaching engines.\ A lot has changed in the automotive world in the past 50-60 years that, but what has not changed are the things people will believe and perpetrate as "truth and facts". Oil science is pretty slick.
That's what I am referring to . The Flow Characteristics of 2 oils , 70 years different from one another in additives and refining process , being compared is the same as comparing Apples to Oranges. It is not a good test . That's ALL I was mentioning about the presentation . No need to worry about what other stuff is in my head from that post . Just a statement about one aspect of the presentation . Are modern oils better ?? Of course As for the urban myth of Non detergent versus Detergent oil I disagree . Hell some car manufactures still thought oil filters were an option into the early 60's .
Ahhh.. I understand now. And yes, you are correct on that point. I did mis-interpret what you posted.
